# Mishimoto 2013+ Ford Focus ST/2016+ Focus RS Aluminum Expansion Tank - Black

Add some reliability and engine bay styling to your Focus RS/ST with the Mishimoto RS/ST expansion tank. This tank features internal baffles to prevent coolant starvation from overflow ports on the engine. Also, during high speed cornering, braking, and acceleration, the internal baffles reduce coolant sloshing. The engineers at Mishimoto have included a sight tube to allow for proper observation of hot and cold coolant levels, making engine maintenance much easier.----Eventually, you'll have to consider the health of your plastic expansion tank. Plastic is prone to failure after years of constant temperature variations. The Mishimoto tank is constructed from durable, TIG-welded aluminum for optimal durability and longevity. It reuses the stock expansion tank cap and includes an overflow nipple on the fill neck for adding an additional coolant tank so your Focus RS stays NHRA legal. All areas of concern are covered with this upgrade.----It's worth noting the Focus's stock tank is an engine bay eye sore, whereas the Mishimoto tank comes in three different variants to help with aesthetic customization: black, wrinkle red, or Wrinkle Nitrous Blue. Each of these options works with both the 2013-2018 Focus ST and the new 2016-2018 Focus RS. For convenience, you can install your new coolant tank upgrade in under one hour as it was engineered with perfect fitment in mind. Like all our Focus RS parts, this expansion tank also includes the Mishimoto Lifetime Warranty.

-   Internal baffle keeps coolant near overflow port during aggressive driving, preventing air entry into coolant system
-   Sight tube allows for proper hot and cold coolant levels
-   Installs in under one hour

This Part Fits:

Year

Make

Model

Submodel

2013-2016

Ford

Escape

S

2013-2016

Ford

Escape

SE

2013

Ford

Escape

SEL

2013-2016

Ford

Escape

Titanium

2013-2018

Ford

Focus

Electric

2016-2018

Ford

Focus

RS

2013-2018

Ford

Focus

S

2013-2018

Ford

Focus

SE

2017-2018

Ford

Focus

SEL

2013-2018

Ford

Focus

ST

2013-2018

Ford

Focus

Titanium

2014-2021

Ford

Transit Connect

Titanium

2014-2021

Ford

Transit Connect

XL

2014-2021

Ford

Transit Connect

XLT

## Details

- **Price:** 415.23 CAD
- **Vendor:** Mishimoto
- **Type:** Coolant Reservoirs

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 415.23 CAD | In stock |

## Images

- Photo - Primary
- Photo - Primary
- User 1
- User 1
- User 1
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/mishimoto-2013-ford-focus-st-2016-focus-rs-aluminum-expansion-tank-black)
> Updated: 2026-06-27